Combination drill

Abstract

A clutch bypass for a combination drill has a gearbox connected to a motor and an output spindle. The gearbox includes a ring gear. A clutch mechanism is coupled with the gearbox to selectively transmit torque from the motor to the output spindle. The clutch mechanism includes at least one link member disposed adjacent the ring gear and a capture member disposed adjacent the link member for selectively engaging the link member. The link member has a slot formed on an end thereof. The capture member has a first position in which the capture member is at least partially received in the slot, and a second position in which the capture member does not engage the link member.

1 . A combination drill comprising: 
 a gearbox connected to a motor and an output spindle and including a ring gear; and    a clutch mechanism coupled with said gearbox to selectively transmit a torque from said motor to said output spindle, said clutch mechanism including: 
 at least one link member disposed adjacent said ring gear, said at least one link member having a slot, and  
 a capture member disposed adjacent said at least one link member for selectively engaging said at least one link member, said capture member having a first position in which said capture member is at least partially received in said slot, and a second position in which said capture member does not engage said at least one link member.  
   
   
   
       2 . The combination drill of  claim 1  further comprising a torque adjustment mechanism including a washer mounted over said output spindle adjacent said at least one link member, a spring seat mounted coaxially with said washer, a torque adjustment ring rotatably mounted on said spring seat for causing the spring seat to move in an axial direction, and a spring disposed between said washer and said spring seat for exerting a biasing force against said at least one link members in said second position, whereby rotation of said torque adjustment ring moves said spring seat in an axial direction to vary said biasing force.  
   
   
       3 . The combination drill of  claim 1  further comprising a hammer mechanism including a first ratchet non-rotatably mounted in a gearbox housing and spaced apart in said first and second positions from a second ratchet fixedly mounted on said output spindle, and a hammer mode selector mounted on said gearbox housing and having a third position in which said second ratchet member is made engageable with said first ratchet member to generate a reciprocating motion of said output spindle in said first position of said blocking member.  
   
   
       4 . The combination drill of  claim 1 , wherein said at least one link member includes a pin having an end portion that defines a circumferential groove.  
   
   
       5 . The combination drill of  claim 4 , wherein said capture member includes a push-button having at least one bracket for engaging said at least one link member in said slot.  
   
   
       6 . The combination drill of  claim 4 , wherein said capture member includes a ring that defines an arced opening for receiving said at least one link member, said arced opening having a tapered portion for engaging said at least one link member in said slot.  
   
   
       7 . The combination drill of  claim 1 , wherein said slot includes an end portion that defines a through hole and said capture member includes a pin that is received in said through-hole for engaging said at least one link member.